One button, one bar, one screen. A bar sweeps back and forth, you tap while it is inside the lit zone, and the zone tightens each time. Free in the browser, no download, about 30 seconds to get it:
https://onemorebar.itch.io/one-more-bar
What I actually want to know: after your first two or three taps, did you tap once more on purpose, or did you stop? If you stopped, at which rep? I am tuning the first reaction, not the difficulty, so any version of that answer helps. Feedback swap welcome, point me at your project and I will play it.